Coursera provides universal access to some of the world’s best education, partnering with universities and organizations to offer courses online.

Founded by Harvard University and MIT in 2012, edX is an online learning destination, offering high-quality courses from some of the world’s best universities and institutions to learners everywhere.

Udacity offers free online courses and nanodegree programs focused on technology.

A non-profit educational organization with a mission is to provide a free, world-class education to anyone, anywhere.

Online learning with a focus on building learning communities.

Open Culture brings together high-quality cultural & educational media for the worldwide lifelong learning community.

Free public domain audiobooks.

Project Gutenberg offers over 53,000 free ebooks: choose among free epub books, free kindle books, download them or read them online.

Internet Archive is a non-profit library of millions of free books, movies, software, music, websites, and more.